Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1998-01-08
2000-10-31
Grant, II, Jerome
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 11, G06F 1500
Patent
active
061411140
ABSTRACT:
An error diffusion processor for preparing a document image for printing. Shadows and highlights regions stress error diffusion processes, because accumulated error cannot be easily compensated for in these regions. Edge enhancement emphasizes the problem by locally increasing error in order to maintain spatial detail of the image. The arrangement described puts an additional term into the error calculation that is a function of local intensity, with substantial value only in shadow and highlight regions to correct for edge enhancement artifacts.
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Eschbach Reiner
Mantell David A.
Costello Mark
Grant II Jerome
Tran Douglas
Xerox Corporation
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